1990 ATP Challenger Series
The ATP Challenger Series is the second-tier tour for professional tennis organised by the Association of Tennis Professionals. The 1990 ATP Challenger Series calendar comprises 71 tournaments, with prize money ranging from $25,000 up to $100,000.
Schedule
August
Statistical information
These tables present the number of singles and doubles total number of titles a singles > doubles hierarchy; 3) alphabetical order.Titles won by nation
| Total | Nation | S | D |
| 19 |  United States |